Improvement in bosing-tool



`may he readily shifted to gear with nacida safe here arpa.

4THOMAS E. STANLEY, 'O Fv HAZLEIIURS'I,v MISSISSIPPI.

Letters .Patent No. 105,271, dated July 12, 1870.

To all whom it may concern.-

Be it known that I, THOMAS E. STANLEY, of Hazle- `hurst, in the countyof Copiati and State of Missisforming part of this specification.

This invention relates to boring-machines, and consists` in certainimprovements thereon.

Figure l vrepresents a front 'elevation of my iinproved machine, and

Figure 2 represents a side elevation of the same. Similar letters ofreference indicate corresponding parts.

A is the large horizontal wheel, such as commonly used for driving thevertical spindles or stocks, B, for the auger.

Tothis wheel I add a second smaller toothed rim, C, (D being theordinary toothed rim,) and I arrange the driving-wheel, E, on thecrank-shaft F, sothat it one or the other of these rims, for driving thespindle fast or slow, according to the size of the anger, or the natureof the wood to be bored, whether hard or soft, and I provide set-screws,G, or other suitable means for securing it ineither position.

H represents projections on the gate or carriage I, supporting thespindle and operating gear.

They are crotched in the ends (or may have holes thereat) for ttingagainst or around the screws K, permanently fixed to the vertical frameparallel with the line of vmovement of the carri ge.

These screws have adjustable nuts, L, on them under the projections, forarresting the movement of the carriage when the projections come downupon' them.

They may be set at any required height to stop the boring at any depth.'A

Scales, M, may be placed on the posts to indicate theposition requiredfor the -nuts for holes 'ofany required depth.

The stopping of ,the carriage'in this way admits of continuing therotation of the augerasuicient length of time to draw out the chips andclear the holes in a simple andexpeditious manner. N is a pressurefeed-screw, screwing down through a nut in the cross-beam O, upon ayoke, Q, springing over the crank-shaft, and bearing on a block, R,swiveled to the top of the auger spindle.

This screw is provided with a hand-crank, T, at the top, and abevel-wheel, U, at the bottom. The latter gears, when the screw is downupon the yoke, with lanother bevel-wheel,-V, 0n the crank-shaft, sothat, when the crank-shaft is turned, the screw will vbe turned also,and caused to press the carriage and auger spindle down to insure thefeeding in cases where the gimlet points of theraugers fail to eiect thesame.

The itch of the screw and its speed should he so adjusted, relatively tothe speed of the auger spindle and the pitch of the auger, as to cause acontinuous and uniform pressure as the operation continues.

Having thus described my invention,

`I claim as new'and desire to secure by Letters Patent- The frame I,perforated ears H H, nuts L, threaded bars K, pressure screw N, spindleB, yoke Q, block R, two rimmed wheel A C, adjustable wheel E, andbevel-gears U V, all relatively constructed and arranged on the mainframe as set forth. n

T. E. STANLEY. Witnesses: l

IW. J. WrLsoN, S. WICKERT.

